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Liebert iTRUST UPS System
User Manual
E1-20020516-C-1.0
Liebert Corporation
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Contents Chapter 1 Introduction .....................................................................................................................1 1.1 Basics.................................................................................................................................1 1.2 Configuration ......................................................................................................................1 1.3 Operation Theory........................................
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5.1.4 Alarm Buzzer..........................................................................................................46 5.1.5 LCD and Menu Keys ..............................................................................................46 5.2 The displayed information ................................................................................................48 5.2.1 Opening display .............................................................................................
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Chapter 8 Parallel System .............................................................................................................87 8.1 System Introduction..........................................................................................................87 8.1.1 Basics.....................................................................................................................87 8.1.2 Theory of Operation...............................................................
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Chapter 1 Introduction Chapter 1 Introduction 1.1 Basics The Liebert iTrust UPS System is connected between the utility source and the critical load to provide uninterruptible power to the load. The power from the UPS being free of voltage and frequency variation and disturbances from utility. The UPS has an output isolation transformer to provide galvanic isolation between the load and utility. The UPS also uses the latest in high frequency double conversion PWM technology and a f
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Chapter 1 Introduction 1.3 Operation Theory The UPS circuit diagram is shown in Figure 1-2. AC2 TR1 Q1 L1 FU1 KM1 A1 B1 FU2 C1 KA1 FU3 Res1 Res2 Q2 A2 B1 C1 N2 KM2 BP DC1 BN Res3 Q3BP FU4 Q5 U FU5 V FU6 W N AC4 AC3 TR2 DZN6 Figure 1-2 Main circuit of UPS The utility source is input at Q1 and flows through the fuse, the transformer, inductor and into the high frequency rectifier which will convert the AC power into DC power. The rectifier has PFC and charger functi
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Chapter 1 Introduction The double DSP and MCU form the full digital control system to realize the powerful function of the UPS. The switching between the operation modes is realized by controlling the bypass static switch and the inverter static switch. Advanced battery management prolongs battery life. Multi-communication ports and management software make it possible for the customer to monitor the UPS performance locally or remotely. The Liebert UPS uses full digital, discrete and o
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Chapter 1 Introduction Front view 1:Fan 2:rectifier 3: softstart relays 4:contactor 5: two auxiliary power supply boards ULW2L61M5 6: D level lightning protection device SPD12Z 7: Hall current sensor 8:battery input terminals 9:circuit breaker Q3BP for maintenance 10:rectifier input circuit breaker Q1 11:bypass input circuit breaker Q2 12:Inverter
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Chapter 1 Introduction Bypass Mains output ~ - - ~ Figure 1-5 Normal mode 2. Battery Mode When the utility fails, the UPS system will switch to battery mode without interruption and the battery will power the load through the inverter. The UPS can return to normal mode automatically when the utility returns to normal, as shown in Figure 1-6. Bypass Mains output ~ - -~ Figure 1-6 battery mode 3. Bypass Mode In the event of an inverter overload which last longer than
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Chapter 1 Introduction 4. ECO Mode If the load has no requirement for power quality but has a high requirement for efficiency, then the UPS can be set in ECO mode. In this mode, the system will power the load through the static bypass switch and the rectifier will charge the batteries. When the bypass source fails or out of normal range, the UPS will revert back to normal mode and powers the load through the batteries. The total transfer time will be less than 15 msecs. When the
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Chapter 1 Introduction 6. United Power Mode When the utility is not available and the capacity of the generator set is inadequate to support the load, the battery will power the load together with the generator automatically. The operating time under this mode should not exceed the autonomy time of the batteries, as shown in Figure 1-10 Note : This mode can only be set by qualified personnel only. Bypass Mains output ~ - - ~ Figure 1-10 7. Parallel Operation mode When
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Chapter 1 Introduction Bypass Mains output ~ - -~ Fig 1-12 1.6 Basic Functions Battery Management Function - The UPS has advanced battery management functions including battery fault detection and backup time forecast. Soft Start Function - Complete delay soft start function can reduce the surge to the UPS unit and utility source. Alarm and Protection Function - The UPS can generator audible and visual alarm through LCD, input/output contacts and network
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Chapter 1 Introduction Parameters of Liebert iTrust UPS are given in Table1-1 Capacity 20kVA 30kVA 40kVA 60kVA Model UL33-0200L UL33-0300L UL33-0400L UL33-0600L Input Voltage 380/400/415V(line-to-line voltage) AC Power Input Three-phase three-wire Power Factor >0.99 Harmonic Current <4%(Voltage distortion lower than 2% at rated load) +15%~-20% Rectifier Voltage Range input Lowest operating voltage: -45% Input Current: <115%In for continuous operation; 115~140%In for 5 minutes; 14
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Chapter 1 Introduction Capacity 20kVA 30kVA 40kVA 60kVA Model UL33-0200L UL33-0300L UL33-0400L UL33-0600L 105% load 125% , transfer to bypass mode after 10 0.1min; < ± Overload capability(inverter) 125% < load 150% , transfer to bypass mode after 1 minute; When load > 150%, transfer to bypass mode after 200ms 135% Rated Current continuously 135%~170% for 1 minute Overload capability(bypass) >170%, shutdown in 2s Output 1000% rated current for 20ms(a standard for selecting static
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Chapter 1 Introduction Capacity 20kVA 30kVA 40kVA 60kVA Model UL33-0200L UL33-0300L UL33-0400L UL33-0600L Insulation Resistance >2M(500VDC) (input to earth, output to earth)2820Vdc, leakage current lower Dielectric Strength than 3.5mA, 1min without arc Satisfy the class IV requirements specified by IEC60664-1, the Surge Immunity ability to withstand 1.2/50us+8/20us not lower than 6kV/3kA System Protection index IP20 Number of battery cells 30 battery cells(12V) Installation Cable
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Chapter 2 Cabinet Installation Chapter 2 Cabinet Installation 2.1 Environmental Conditions Operating Temperature : 0~ 40°C Storage Temperature: -40~ 70°C(with no battery) -20~ 55°C(with battery) Relative Humidity:5%~95%, no condensation Cooling method : Fan cooling Elevation:1500m Maximum Tilt : 5 degrees Pollution :Class II The UPS should be installed in a cool place with good ventilation, low humidity and free of dust. The recomm
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Chapter 2 Cabinet Installation Figure 2-1 4 fixing holes 4 screws for levelling feet Figure 2-2 External Dimensions of 40/60kVA UPS are shown in Fig. 2-3 and its installation position is shown in Fig. 2-4. 14
